Nice article on the PDP-11 here. My own career since 1990 has been based on the descendants of this machine and its operating system.
https://arstechnica.com/gadgets/2022/03/a-brief-tour-of-the-pdp-11-the-most-influential-minicomputer-of-all-time/
(https://cdn.arstechnica.net/wp-content/uploads/2022/03/PanelInCase_Side-800x540.jpg)
Back in the 80s/90s I worked with DEC equipment a lot, mainly PDP11/44s as well as VAX mainframes and all the old associated tape drives, disk drives, line printers etc. Leading to OpenVMS workstations. All sadly gone now after DEC was sold to Compaq